# Causal Operations in Quantum Field Theory

### APA

Jubb, I. (2022). Causal Operations in Quantum Field Theory. Perimeter Institute. https://pirsa.org/22040107

### MLA

Jubb, Ian. Causal Operations in Quantum Field Theory. Perimeter Institute, Apr. 08, 2022, https://pirsa.org/22040107

### BibTex

@misc{ pirsa_PIRSA:22040107, doi = {10.48660/22040107}, url = {https://pirsa.org/22040107}, author = {Jubb, Ian}, keywords = {Quantum Foundations}, language = {en}, title = {Causal Operations in Quantum Field Theory}, publisher = {Perimeter Institute}, year = {2022}, month = {apr}, note = {PIRSA:22040107 see, \url{https://pirsa.org}} }

Ian Jubb Dublin Institute For Advanced Studies

## Abstract

While Quantum Field Theory is the most accurate theory we have for predicting the microscopic world, there are still open problems regarding its mathematical description. In particular, the usual quantum mechanical description of measurements, unitary kicks, and other local operations has the potential to produce pathological causality violations. Not all local operations lead to such violations, but any that do cannot be physically realisable. It is an open question whether a given local operation in the theory respects causality, and hence whether a given local operation is physical. In this talk I will work toward a general condition that distinguishes causal and acausal local operations.

Zoom Link: https://pitp.zoom.us/j/98089863001?pwd=K2RWL2lNWFd4VDZYd013eUN3alNmQT09